Jack



Jan. 19, 1932. I u 1,842,183

JACK I Filed June 14, 1929 Z'NVENTORI MILL/1R0 E LUCKER Patented Jan. 19, 1932 UNITED STATES PATENT OFFIC MILLARD B. LUCKER, OF BENTON HARBOR, MIOH IG-AN, ASSIGNOR '1'0 AUTO SPECIALTIES MANUFACTURING vCOMPANY, OF SAN FBANOISOQOALIFORNIA, A. CORPORATION OF CALIFORNIA JACK Application filed June 14,

My invention relates in eneral to lifting jacks and has more particu ar reference to a jack adapted for use under vehicles and the like, although it will be apparent that my invention is not restricted to vehicle jacks.

Oneof the objects of my present invention is to provide a vehicle ack which can be manipulated and moved about by its operating handle, whereby to permit the jack to be readily moved'about and shifted into desired positions.

Another important object is to provide a simple rugged inexpensive jack handle having a portion adapted to readily form an interlocking operative connection with a lifting jack, whereby the same may be shifted about in the direction of the handle and by means of the handle.

Still another important object of the invention is to provide a simple inexpensive Y rugged and serviceable handle for manipu lating a jack.

A further important object, is to provide a novel interlocking construction between the operating hand and drive mechanism of a lifting jack.

A still further object of the invention is to provide a light, rugged and cheap driving pinion for a jack.

Numerous other objects and advanta es will be apparent as the invention is more ully understood from the following description which, taken in connection with the accom Figure 2 is a cross section taken substanw i tially along the line 2.-2 of Figure 1;

Figure 3 is a cross section taken substan-' tially along the line 3-3 in Figure 1; and- Fi e 4 is a perspective view of an end of operating member for the jack of my I in v ention.

To illustrate invention I have shown orniithe drawings-a lifting device or ack com- P sing a main frame including a base 11 and 1929. Serial- No. 371,010.

a sleeve 13, extending upwardly of the base to provlde a housing for an extensible member 15 which is mounted for extension or retraction with respect to the frame. x The extensible member may be of any desired form and is provided with means 17 formed in its sides or interengaging an operating member 19 which is mounted in the frame for causing the extensible member to travel in and out of the housing or sleeve 13.

In the illustrated embodiment; the extensible member is shown as a threaded .rod carrying a load engaging head 21 at one end which projects above the frame and a collar encircling the rod and having internal threads meshing with the threads 17 of the rod, and gear teeth 23 are formed at the periphery of the collar.

Other forms of extensible and operating members may be employed and are within the contemplation of my invention.

In order to operate the extensible member, I provide means including a driving member comprising, in the illustrated embodiment, a pinion 25 having gear teeth 27 meshing with the teeth 23 vof the driving member and an operating handle 29 detachablyconnectable to the driving member in a novel manner whereby the handle can be used to move the lifting device from place to place to thus accurately position same, as for instance, beneath the axle of a vehicle to lifted.

' The driving pinion 25 is preferably formed atone end of a cylindrical member 35, which is rotatably mounted in a, support 5 1 formed in an arm37 which extends from the sleeve 13 and which is formed as a part of the main frame of thejack. As a matter ofimprovementand to facilitate (assembly operations,' I prefer to form the gear teeth 27 directly in the end of the member 35 and within the zone of the sides of the shaft, so that the same may be assembled in the support 51 by axially slidin the teeth 23 of the op erating member 19, t e inward movement of the shaft and gear 25 through the bearing being limited by the engagement of the outer end of the bearing 51 with an outstanding 10c flange 53 formed in the outer end of the shaft to overlie the outer end of the hearing. In order to journal the stub shaft and gear in operative position in the support, I form a wide annular groove 55 in the cylindrical member and arrange a collar 57 comprising a pair of co-operating semi-circular bearing pieces 59 of suitable material in the groove 55. The support is or may be roughly finished to provide a bore 61, capable of receiving the member and its embracing hearing pieces 59 and the pieces 59 are formed of sufficient size to have a driving fit within the bore 61, the groove 55 of the member 35 being of suificient width and depth to permit of free rotation of the member within the bearing formed there around by the bearing pieces. The parts may be assembled by positioning the pieces 59 in the groove 55 an thereafter driving the member 35 and the embracing pieces into the bore 61, until the flange 53, engages the outer end of the support 51. It will be apparent that the pieces 59, will not interfere with the rotation of the stub shaft and gear 25 in the bearing 25,

. but will provide a satisfactory and inexpensive pinion gear mounting.

In order to provide an operating handle which is of simple and rugged construction and hence inexpensive and which, at the same time, forms a readily detachable positive interlocking connection with the lifting device, whereby the jack assembly may be shifted about bodily in addition to the facile. manipulation of the lifting device from a distance to extend the lifting member, I form the handle which may comprise a rod 31 of any suitable cross-sectional configuration with an end 33 having a non-circular cross section, that is, a crosssection having a larg r and a smaller dimension.

In the illustrated embodiment, the preferred cross-sectional configuration at the end of the handle is shown as substantially oval, having a relatively long and a relatively short axis. The driving pinion 25 is formed with a stub shaft 35, which is journalled in an arm 37 extending from the sleeve 13, and I provide this shaft with an axial opening or socket 39 which at the outer end .of the shaft is of a peripheral configuration to correspond with the shape of the formed end of the rod 31, so that the same may be inserted in the opening and by engaging the non-circular sides thereof be used to .turn the shaft and pinion to thus impart operative movement to the extensible member, through the agency of the collar 19. To provide for detachably interlocking the 'end of thehandle in the socket 39, the end of the rod 31 is flattened and provided with an outstanding tongue 41 and the interior portions of the socket 39 is enlargedto provide a chamber 43 and an inwardly facing shoulder 45 around the mouth of the socket 39 behind which the tongue 41 may engage after the end of the rod has been introduccdthrough the non-circular mouth of the socket. This insertion may be accomplished by angling the rod into place as illustrated in dotted lines in Figure 1 of the drawings.

The handle may thus be quickly and easily detached from the jack or inserted in position to operate the lifting mechanism and when. inserted may be used as a shifting handle to facilitate the manipulation of the jack assembly to a desired position, the tongue 41 preventing the rod from being withdrawn axially from engaged position andthereby permitting the jack to be drawn toward the operator without becoming detached from d the handle.

An important advantage of my invention resides in the simplicity of the operating handle which can be made by a single operation on a punch press and which is consequently cheap to make while providing an adelguate efficient means for manipulating a ac It is thought that the invention will be understood from the foregoing description,

and it will be apparent that numerous.

changes may be made in the form construction and arrangement of the several parts without departing from the spirit or scope of the invention or sacrificing any of its attendant advantages, the form'herein before described beingof a preferred embodiment for the purposes of illustrating my invention.

Having thus described my present invention, what I claim as newand desire to secure by Letters Patent is:

1. In a screw lifting jack, a rotary operating pinion having an inner bore and a noncircular opening through a wall of said pinion communicating with the inner bore, of a crank for rotating said operating pinion and having a non-circular end receivable in the opening and extending in the bore, and means formed on said end to maintain the crank in position relative to said member.

2. In a jack, a rotary operating pinion and a removable crank to rotate the pinion, said pinion having a chamber therein and an openmg communicating with the chamber, said crank having an end adapted to extend through the opening in the pinion and into the chamber, a lug on said crank'end and engageable with the Wall of the pinion inside of the chamber, said opening in the pinion and crank end being constructed and arranged to prevent the crank from rotating in the opening.

3. In a jack, a rotary operating pinion having a chamber therein and an opening through a wall of the pinion communicating with the chamber saiii opening be' noncircular, a' crank 'for rotating sai i ginion and having a non-circular end engageable with the non-circular opening, whereby rotation of the crank will rotate the pinion, and

:1 lug bent from the endof said crank and extending into the chamber and engaging thematerial of the pinion at the opening when the crank is inserted in the pinion for rotation thereof.

In witness whereof, I have hereunto subscribed my name.

-' MILLARD B. LUCKER. 

